Improvement in tumbling-barrels for cleaning castings



F. N. BIXBY.

Tumbling-Barrels for Cleaning Castings. No. 137,409, PatentedApriH,1873.

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FREDERICK N. BIXBY, OF WEST MERIDEN, CONNECTICUT.

IMPROVEMENT IN TUMBLlNG-BARRELS FOR CLEANING CASTINGS.

Specification forming part of Letters Patent No. 137,409, dated April 1,1873; application filed February 17, 1873.

To all whom it may concern:

Be it known that I, FREDERICK N. BIXBY, of West Meriden, in the countyof New Haven and State of Connecticut, have invented an ImprovedTumbling-Barrel, of which the following is a specification:

Figure l is a vertical transverse section of my improved tumbling-barreland Fig. 2 a top view, partly insection, of the same.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention has for its object to so construct tumbling-barrels forthe cleansing of parts of machinery and other articles, that sucharticles cannot be injured during the tumbling process by any creases orprojecting edges within such barrel, adefect frequently occurring intumblingbarrels of the ordinary construction.

My invention consists in constructing a prismatic tumbling-barrel of aseries of plates which are fastened to the heads or ends of the barrels,and which are provided with lips that underlap the plates, the lipsbeing corrugated or grooved on their outer surfaces to formdischarge-openings for the dust that becomes disengaged during thetumbling operation. The inner ends of the lips are rounded to furnishwithin the barrel corresponding rounded shoulders, by which the articlesbeing tumbled cannot be injured.

In the accompanying drawing, the letter A represents the supportingframe-work of my improved tumbling-barrel. Upon the same is hung, insuitable bearings," the shaft B which carries the barrel C. This barrelconsists of two head or end plates, or a, and of six, more or less,rectangular plates, 1) b, which are fastenedby means of screws (1, orotherwise, to the edges of the peripheries of the heads, to constitute ahexagonal or otherwise prismatic barrel. Each plate I) has at one sideor edge an inwardly-projecting lip, c,- which lip, when the barrel isput together, fits under the adjoining plate b, in the manner clearlyshown in Fig. 1. The several lips c e are corrugated on their outersurfaces, or grooved in such manner that channels are formed between thelips and the plates that cover them for the discharge of dust from thebarrel. Instead of grooving the outer surfaces of the lips e thecontiguous inner surfaces of the plates 11 may be grooved in equivalentmanner. The edges of the lips e e are rounded, as shown, so that thearticles which are being tumbled in the barrel will not meet any sharpedges whereby they can be injured.

Claims.

WVitnesses:

GHAs. H. SHAW, ROBERT FooTE.

